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Sort of jagged movement on DV files
Hi, I’ve been working on some DV files in AE and when I do a RAM preview or Render the file in a comp, I get this undesirable effect shown in the file linked below (look at the arm):
Quicktime render (700KB download)
https://www.escuelasporlaidentidad.educ.ar/armadores/mov_prob_ae_render.movWhen working in Premiere or just watching the file on Windows Media or even VLC player, I get smooth movement:
Adobe Premiere avi crop (7MB download)
https://www.escuelasporlaidentidad.educ.ar/armadores/mov_prob_crop_original.aviI’m working on AE 6.5 / win2000, but I’ve trayed on AE7 / winXP and the same happens. My AE comp has the same settings as the DV file, I ‘ve run tests with different footage interpreteation settings, and still the same. This jagged movement also occurs with uncompressed video (displayed on any software) and tif sequence reimported in AE. Maybe it have to do with Microsoft DV codecs?
Thanks,
Marcelo -
2 Replies
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It’s because you’re working on interlaced footage. DV is interlaced by nature, and in postproduction it’s always best to work on progressive video, so after effects interprets the footage so that only one field is visible. Its like deinterlace on-the-fly.
to change that you should right click on your footage in AE, choose Interprete footage > Main, and then turn Seperate Fields off.
maltaannon.com – Free After Effects Video Tutorials and more
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or when you render out of ae, click the render settings, and set the render to use fields and the appropriate dominance. that way if you add any graphics, they will be interlaced too, and it you use any effects that would effect the fields, like a blur or choking a matte, then those will be done on deinterlaced footage, then reinterlaced at render.
if you work a lot with interlaced footage, and need to output as such, save a render setting with field render on, that way it’s easy to select when you need it.
Kevin Camp
Designer – KCPQ, KMYQ & KRCW
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